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Kimbo
Paul Ricard


Joined: 05 May 2011
Posts: 3459
Location: East Sussex


PostPosted: Sun Dec 10, 2017 7:41 pm    Post subject: Battery on the way out? Reply with quote



Hot or cold, my battery/starter motor starts very slowly and it feels like I've got a flat battery but eventually catches after one turn.

Normal? Knackered? On the way out?

I started another Cayman the other day and it burst into life straight away.

If knackered, any recommendations on a battery? Currently have a Banner Starting Bull 80 ah, 660 cd. There is no way of telling how old it is.

Thank you chaps.
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alex yates
Donnington
Donnington


Joined: 06 Mar 2014
Posts: 11659
Location: 4,000 holes in Blackburn, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Dec 10, 2017 7:44 pm    Post subject: Reply with quote

Hook up another car with jump leads and try it. If sluggish not battery, if fine then battery.
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Kimbo
Paul Ricard


Joined: 05 May 2011
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PostPosted: Sun Dec 10, 2017 8:00 pm    Post subject: Reply with quote

Nice idea, ta.
Does the other car have the engine running?
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alex yates
Donnington
Donnington


Joined: 06 Mar 2014
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Location: 4,000 holes in Blackburn, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Dec 10, 2017 8:11 pm    Post subject: Reply with quote

Yes, then you're maximising the ampage and also avoiding doing any damage to the other cars battery if yours is goosed.
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Demort
Estoril


Joined: 21 Mar 2015
Posts: 3668
Location: Brighton


PostPosted: Sun Dec 10, 2017 9:32 pm    Post subject: Reply with quote

Drop by the garage young man .. it dont take 5 mins to test your battery .. possible power dist problem but i expect its just a battery.

Bosch 740 sae i expect it will be .

If you are around at say 1 then i can do it in my dinner break (come grab me as ill be upstairs ) .. im off tomorrow though ( monday ) so tuesday onwards .
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Kimbo
Paul Ricard


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Location: East Sussex


PostPosted: Sun Dec 10, 2017 9:34 pm    Post subject: Reply with quote

Many thanks Batman Thumb

I'll do Alex's test and if that doesn't show up anything I'll pop down in the week sometime.
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cheshire911
Estoril


Joined: 10 Jun 2012
Posts: 3513



PostPosted: Mon Dec 11, 2017 5:10 pm    Post subject: Reply with quote

I'd urge caution about jumping another battery unless you follow the procedure in the handbook. Sometimes there can be a power surge that blows or damages the ECU.
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Kimbo
Paul Ricard


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PostPosted: Mon Dec 11, 2017 7:05 pm    Post subject: Reply with quote

Oh Gawd. What?

Alex?
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alex yates
Donnington
Donnington


Joined: 06 Mar 2014
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Location: 4,000 holes in Blackburn, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Mon Dec 11, 2017 7:23 pm    Post subject: Reply with quote

Kimbo wrote:
Oh Gawd. What?

Alex?


http://www.porscheownersmanuals.com/2011-cayman-manual/2/246/Emergency-Starting-with-Jumper-Cables

Connect jumper cables in the following sequence:
Always observe the sequence below:

Connect the positive lead (red) to the positive terminal of the discharged battery first, then connect it to the positive terminal of the donor battery.
First connect the negative cable (black) to the negative terminal of the donor battery, then connect it to a suitable grounding point on the vehicle with the discharged battery.
This grounding point must lie as far as possible from the battery.
For example, a solid metal part or the engine block are suitable grounding points.

If no suitable grounding points are to be found on either vehicle, the negative cable must carefully be connected directly to the negative terminal of the battery.

If a suitable grounding point is to be found only on the donor vehicle, the negative cable must first be connected to the terminal of the discharged battery, then to the grounding point of the donor vehicle.
Run the engine of the donor car at a higher speed.
Start the engine.
An attempted start using jumper cables should not last more than 15 seconds. Then allow a waiting period of at least one minute.
Note
Before disconnecting the jumper cables, electrical loads such as the heated rear window and the heating fan blower should be switched on (the vehicle's lights must not be switched on). This reduces voltage peaks which may occur when disconnecting the jumper cables.
With the engine running, remove both jumper cables in reverse order.
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porkyb1
Trainee


Joined: 10 Jan 2009
Posts: 80
Location: Devon


PostPosted: Mon Dec 11, 2017 10:04 pm    Post subject: Reply with quote

Why not just test the battery with a multimeter?
 
  
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alex yates
Donnington
Donnington


Joined: 06 Mar 2014
Posts: 11659
Location: 4,000 holes in Blackburn, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Mon Dec 11, 2017 10:07 pm    Post subject: Reply with quote

Because a multimeter won't put a load on the battery to tell you its kicking enough amps out, it will only measure the voltage.
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Zingari
Donnington
Donnington


Joined: 25 Oct 2009
Posts: 11965
Location: Cheshire

1993 Porsche 964 Anniversary

PostPosted: Mon Dec 11, 2017 10:17 pm    Post subject: Reply with quote

Just buy a new battery for £60 and then you'll know and have a 2-3yr guarantee Thumb
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rigsby99
Silverstone


Joined: 22 Oct 2015
Posts: 141
Location: South Cheshire


PostPosted: Mon Dec 11, 2017 10:49 pm    Post subject: Reply with quote

Put a capacitor across your battery terminals to stop spiking from any source. Purpose made voltage protectors only cost about £6-8. You can put a volt meter across the battery then turn the engine and note the voltage, make sure the probes are in contact with the battery posts not the cables, this will give true battery voltage, if it drops when the probes are on the cables then you have a poor connection or earth.
 
  
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kurlykris
Kyalami


Joined: 30 Jun 2014
Posts: 1910
Location: Warwickshire


PostPosted: Mon Dec 11, 2017 11:05 pm    Post subject: Reply with quote

Guys, Guys, you`re all getting a little technical here, our beloved Kimbo is an artist, not an engineering wizard, he just wants to know if his battery is goosed Grin

Kimbo, let Demort check it for you in his lunch hour, you run the risk of serious damage to electronic systems in your car if you fanny about with something you`re not comfortable with Thumb

Still loving the Rat look Cayman thumbsup

Both my Porschas were slow on the first rev/crank/turn of the engine today due to the cold weather, it`s just thick oil/very cold engine and the battery takes a dip due to the ambient temperature Grin
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cheshire911
Estoril


Joined: 10 Jun 2012
Posts: 3513



PostPosted: Tue Dec 12, 2017 10:23 am    Post subject: Reply with quote

I wouldn't risk a jump start unless its done by a Porsche specialist with in-line surge protector and following the procedure in the handbook.
Even my Mercedes Benz has a complicated jump start process that I just call out MB Mobilo breakdown support who use a special cable with a massive in-line surge protector to prevent voltage surge/spikes from blowing the ECU and the entertainment system.

There is another post of someone's PCM 2.0 gone bust following a jump start attempt and the posts suggest that its now goosed and possibly (probably?) related to voltage surge at jump start.

If there is a doubt on your battery, have a simple test and/or simply replace it irrespective.
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alex yates
Donnington
Donnington


Joined: 06 Mar 2014
Posts: 11659
Location: 4,000 holes in Blackburn, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Dec 12, 2017 10:50 am    Post subject: Reply with quote

The information above is from the handbook.
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cheshire911
Estoril


Joined: 10 Jun 2012
Posts: 3513



PostPosted: Tue Dec 12, 2017 11:51 am    Post subject: Reply with quote

I never said it wasn't. But reading it, its obvious there are caveats with a jump start process as per Porsche.

I had a discharged battery in first year of ownership from car standing idle.
Rang my specialist and he cautioned me as I have cautioned here and advised me to put a CTEK charger on it and try once the charger lights said its ready.

If it didn't start, he said he'd come out to jump start it or change the battery due to the process - which he knows and does not need to read from the handbook as he was Porsche-trained technician before he set up on his own.

Luckily it started after time on the CTEK so a call-out was not needed, but to this day, I remember his advice not to attempt to jump start it without following the handbook procedure and to make sure any breakdown specialist reads and knows the procedure (he knows examples of owners who'd blown their ECU from attempting a jump start).
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Kimbo
Paul Ricard


Joined: 05 May 2011
Posts: 3459
Location: East Sussex


PostPosted: Tue Dec 12, 2017 12:56 pm    Post subject: Reply with quote

kurlykris wrote:
Guys, Guys, you`re all getting a little technical here, our beloved Kimbo is an artist, not an engineering wizard, he just wants to know if his battery is goosed Grin

Kimbo, let Demort check it for you in his lunch hour, you run the risk of serious damage to electronic systems in your car if you fanny about with something you`re not comfortable with Thumb

Still loving the Rat look Cayman thumbsup


Thank you mate, might be the best solution.

But I do appreciate the posts. Thanks chaps.



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Last edited by Kimbo on Tue Dec 12, 2017 1:00 pm; edited 1 time in total
 
  
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alex yates
Donnington
Donnington


Joined: 06 Mar 2014
Posts: 11659
Location: 4,000 holes in Blackburn, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Dec 12, 2017 12:57 pm    Post subject: Reply with quote

What type of artist? Drinkers Grin
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Kimbo
Paul Ricard


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PostPosted: Tue Dec 12, 2017 1:01 pm    Post subject: Reply with quote

Hic Viking Cheers
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